Quartz sand is an important industrial mineral raw material, mainly composed of silicon dioxide. It is milky white or colorless and translucent, and aggregates often occur in granular, dense massive, clustered, or cryptocrystalline stalactite forms. It is widely used in glass, casting, ceramics and fireproofing materials, ferrosilicon smelting, metallurgical flux, metallurgy, construction, chemical, plastics, rubber, abrasives, and filter media industries. With the increasing demand for industrial quartz sand, the purity requirements are also becoming increasingly stringent.
Quartz sand generally contains weakly magnetic impurities such as iron and titanium. These impurities are typically removed using magnetic separation. Magnetic separation is highly effective at removing weakly magnetic minerals from quartz sand and is currently one of the most widely used separation methods in the quartz sand industry.
The quartz sand magnetic separator is a powerful tool to help customers complete their quartz sand magnetic separation tasks. Magnetic separators for quartz sand separate magnetic and non-magnetic minerals, removing iron-containing impurities from the quartz sand through magnetic separation.
Generally, for quartz sand containing primarily weakly magnetic impurities, a wet high-intensity magnetic separator at a strength of 10,000 Oersted or higher can effectively separate them. For quartz sand containing primarily magnetite, strongly magnetic impurities, a weak or medium-intensity magnetic separator is more effective.
Wet high-intensity magnetic separators are optimal for quartz sand production, yielding high-quality quartz sand concentrate with an Fe₂O₃ content of 0.036%. The iron removal efficiency of wet high-intensity magnetic separators is affected by parameters such as feed rate, washing water volume, and magnetic field strength, with magnetic field strength having the greatest impact. Furthermore, the more magnetic separation cycles and the finer the quartz sand particle size, the better the iron removal effect.
Firstly, permanent magnet magnetic separators should be prioritized. Permanent magnet equipment has advantages such as simple structure, stable performance, and low operating costs. When permanent magnet equipment can meet the separation requirements, it should be used whenever possible. Electromagnetic or other high-intensity magnetic separators should only be considered when higher quality requirements are needed or when permanent magnet separation cannot achieve the desired results.
Secondly, use a weak magnetic separator first, then a strong magnetic separator. Quartz sand often contains strong mechanical ferromagnetic impurities during crushing. These should be removed first using a weak magnetic separator, followed by a strong magnetic separator to remove the weaker magnetic impurities. If a high concentration of strong magnetic materials is used directly for iron removal, these materials can easily clog the strong magnetic separation channel, affecting the separation performance.
